Precision rolling disk colter



Feb. 24, 1942. P. s'roNER PRECISION ROLLING DISK coLTER y Filed June 6,1940 ATTORNEY.

Patented Feb. 24, 17942 .UNITED fsv'rrifEsV PATENT OFFICE s y j2,274,438 j PRECISION lROLLING DISK COLTER Paul Stoner, Valparaiso,Ind., assignor of fifty per cent to Ruth Stoner and fifty per cent toCatharine Stoner, both of Valparaiso, Ind.

Application June 6, 1940, Serial No. 339,155

, 4 Claims. (Cl. 97-209) My invention relates to improvements inprecision rolling disk colters and it more especially relates to thefeatures pointed out in the annexed claims.

The purpose of my invention is to provide a,

Vand that is equally adapted toa single or multiple bottom plows. Thestructure avoids the complexities that have hitherto characterized theuse of rolling disk colters. e I

With these and` other ends in view I` illustrate in the accompanyingdrawing such instances of adaptation as will disclosethe broad idea ofthe invention without limiting myself to the specific details shownthereon and described herein.

Fig. l is a front elevation looking toward the rear.

Fig. 2 is a top. plan view partly in section of Fig. l in an enlargedrelation.

Fig. 3 is an enlarged side elevation. Fig. 4 is an elevation of .amicrometric adjustment plate.

Fig. 5 is an enlarged plan view of theadjusting features of Fig. 2partly in section.

Fig. 6 is a top plan view in section on the center line of a modifiedform of clamping bolt.

Fig. 7 is a miniature side elevation.

In practicing my invention, I may use whatever equivalents ormodifications of structure that. the exigencies of varying conditions`may demand without departing from the broad spirit of the invention.

On a plow beam I I attach a rigid vertical support 2 by means of aclamping plate 3 and a suitit will remain unchanged, and will hold thefront half II of the colter I I) approximately parallel with the furrowthat is being made by the plow.

This avoids side draft and reduces the power required to move the colterthrough the earth in advance of the plow.

The colter I0 is mounted in a bearing I2 of any desired type. Asexemplified, it has an upstanding extension l, by means of which it isattached to the vertical support 2 by bolts 8. The micrometric member 9is placed between 6 and 'I. It is secured in place by through bolts. Themember 9 comprises a head portion that may be approximately square incross section and a thin plate I3 attached to it. The thin portion I3has elongated slots I4 for the-through bolts 8. This thin portion, atI5, forms a pinless pivot point.

As shown in Fig. 5, the adjustment of the member 9 between the parts 2and 'I is extremely delicate. Hitherto the basic feature of a delicateand positive adjustment that the position of the colter shall hold tothe furrow that is being plowed has not been undertsood. A relativelylarge movement of the member 9 between the parts 6 and 'I produces only`a slight change in angle of the colter. y

The prior horizontal canting of rolling disked colters has been soextreme as to produce excessive side draft, needless depth and width ofcut. My structure avoids annoying clogging that has been encounteredheretofore. These disadvantages are entirely overcome by my positivelyrigid construction. I have found in actual practice that my present formof colter construction is an advance over previous efforts that havebeen directed toward improvements in this field.

The bearing I2 is provided with a recess at each end in which ringcarriers I6 for balls are placed. On the inside of the bearing there isa tube I'I which extends from the inner retaining ring of the ballbearing at one end to the other at the other end of the bearing. 'Iheinner ball rings are positioned on a tubular extension I8 of the disk 20provided with a square hole therethrough for the square colter pin I9.At the right hand end. of the bearing, Fig. 2, there is a dust disk 20.This engages the adjacent inner ball race ring and its tubular extensionI8 receives the inner ball race ring at the other end.

Next to the part 2U the `disk I0 is placed. Following this, there is aclamping disk 2|. A square head 22 of the bolt I9 is recessed in thedisk 2|. The parts 20, ID and 2| have square openings. At the other endof the pin I9 there is a reduced left-hand thread diameter 23, a nut anda clamping washer 24 which abuts the adjacent inner ball bearing ring.This arrangement clamps the washer 24 and the ydisk 20 against the tubeIl. A Idust guard 25 may be placed adjacent the `washer 24 and the endof the bearing I2,

As shown in Fig. 5 the bolts 8 are bent. As

. angle of ten degrees.

shown in Fig. 6, the bolts 28 may be made straight, and a semi-sphericalrecess 26 formed in the support 2 associated with a Washer 2l will adaptthe bolt to whatever slight changes that may be produced during theshifting of the micrometric member 9.

By forming the bearing l2 and the upstanding portion 'I' rigidlytogether as a unit, there is only one place in the entire arrangementthat adjustments of the most delicate order are made, that is therelation that the member 9 bears to the parts 2 and l.

I attain unusual results through the use of absolutely rigid connectionsthroughout which hold the colter at an approximatelyhorizontal Theposition of the colter on the plow beam may be such that the center ofthe colter is about vertically above the front end of the plow share.Contrary to previous usage I only set the colter to about one-half moreor less of the furrow depth and instead of turning over a width ofground by the colter, approximately the width of the furrow, I only usea narrow width, approximately one-fourth the width of the furrow. It isthe rigid relation of the cant to which the colter is set to the depthand width of cut that secures my exceptional result.

If desired, I may make one or two standard sized members 9. In any eventthe slotted openings I are used to prevent the member 9 from beingdisassembled and lost from off the bolts 8. In practice it rarely may benecessary to exchange the parts 9 for other sizes because of the greatdelicacy and positiveness of its adjustment. The depth to which thecolter will enter the ground is governed by the up and down adjustmentof the support 2 on the plow beam.

What I claim is:

1. In disk colter plow attachments, a plow beam, a vertical dependingsupport rigidly held on the plow beam, an offset in the support, arolling disk colter, a bearing for the colter, an integral extensionfrom the bearing, means for supporting the extension on the dependingsupport, a micrometric adjusting member between the extension and thesupport, said member comprising an enlarged head, a thin plateprojecting therefrom, said plate having slotted openings, and boltspassing through the extension, the support and the slots of the platefor holding the parts in the desired rigid assembled relation.

2. A micrometric adjustment member comprising a relatively thin plateJone edge of the plate having a relatively minimum dimension, and anenlargement along the other edge of the plate of a relatively maximumdimension said plate having slotted openings therein.

3. In rolling colter attachments for plows,A a bearing for the colter,an integral extension from the bearing, a depending support from theplow beam having an olset formed thereon, a pinless pivot at one edge ofthe extension and the support, means at the other edge of said parts formicrometrically positioning the edges with a noncontacting space-areatherebetween, and means for rigidly holding the parts assembled subjectto change as desired whereby the parts are held in rigid unchangingposition after adjustments thereof have been made.

4. A micrometric adjusting plate of relatively rectangular shapecomprising a maximum thickness throughout its length along one edge andextending over a minor portion of its width, and a minimum thicknessthroughout a major portion of its width so as to constitute minimum andmaximum bearing faces whereby the minimum thickness edge forms a pivotalplane.

PAUL STONER.

